Toptech MultiLoad II EXL - 4-20 mA Input Wiring

CHAPTER 5– CONNECTING FIELD DEVICES TO THE I/O BOARD
44 MultiLoad II/ RCU II Explosion Proof Lite (EXL) Installation Guide - Part # 6070
5.4.4.2 MultiLoad II 4 – 20 mA Input Wiring
I/O DIGITAL/
ANALOG
I/O 2 METER
METER 0 METER 1
4-20 mA-IN
+
-
+
-
I+
I-
+
-
4-20 mA
i
4-20mA
%
i
4-20mA
%
4-20 mA-IN
I+ 1
✓
I- 2
✓
V+ 1
COM 2
IOUT 3
N/A 4
4-20 mA
IN
4-20 mA
OUT
IO_DA TB6
4-20 mA IN.I+
4-20 mA IN.I-
4-20 mA IN.I+
4-20 mA IN.I-
*
*
†
4-20 mA-IN
+
-
i
4-20mA
%
4-20 mA IN.I+
4-20 mA IN.I-
*
‡
4-20 mA
INVALCO WCM 7300
LOOP
-
+
-
+
24 GND
24+
4-20 mA
4728 BS&W
4-20
mA-IN
+
-
+
EXT.
†
†
‡
* Note: The 4-20 mA receiver does not contain a voltage source. The loop must be powered either by the transmitter or by an external power
supply. The I/O Board adds 75 Ohms to the loop.
† Note: “4-20 mA IN.I-” MUST CONNECT TO LOOP SUPPLY- !
‡ Note: A separate supply powers the transmitter. 4-20 mA IN.I+ must be connected to the transmitter’s current output.
DO NOT CONNECT “4-20 mA IN.I+” TO LOOP SUPPLY+ !